10 Best Fifth Wheel Locks 2026 in the United States

The BOYISEN 5th Wheel King Pin Lock stands out due to its solid steel construction, which offers robust anti-theft protection for RVs, container trailers, and campers. This heavy-duty lock is designed with ease of use in mind, featuring a convenient handle and an outward-facing turn cylinder, making it simpler to lock and unlock.

The inclusion of three unique keys ensures you have backups and eliminates the worry of others having the same key, thanks to the specially designed blossom lock mechanism that provides enhanced security against break-ins. The lock's high visibility, with an attached warning tag, acts as a reminder to remove it before hitching, which can be particularly handy.

Weather resistance is another crucial aspect, and the solid steel material promises durability, making it suitable for various weather conditions and ensuring a long lifespan. The lock's universal fit makes it versatile for use with different vehicles like RVs, boats, and campers, making it a practical choice for multiple users, including trucking companies and RV dealers.

The Proven Industries Model PL-5 Fifth-Wheel Kingpin Lock is designed to provide robust security for industrial and heavy-duty fifth wheels, including 18-wheelers and RVs. Made in the USA, it boasts a solid-steel TIG-welded collar and a 303 stainless-steel pin, making it highly resistant to power tools and bolt cutters.

Its unique key design prevents lock picking and unauthorized key duplication, enhancing security further. The lock is versatile, fitting various fifth-wheel trailers and accommodating lube plates, which adds to its universal appeal.

Some might find its weight (4 pounds) a bit cumbersome. Additionally, the product does not mention any specific weather-resistant features, which could be a concern for users in harsh climates. Despite these minor drawbacks, if you need a reliable and sturdy lock to protect your trailer or RV from theft, this model is worth considering.

The GenY Adapt 5th Wheel Lock is built to provide strong security for 5th wheel trailer connections, especially the GenY Executive 5th Wheel hitch. Made from 3/16" alloy steel with fully welded construction, it’s designed to resist common break-in attempts like bolt cutters and crowbars, making it a tough physical barrier. Its bright yellow powder-coated finish is not only weather resistant but also acts as a visible deterrent to potential thieves. The lock encloses the trailer coupler, offering a snug fit to prevent tampering.

At 11.5 x 8 x 5 inches, it’s a substantial piece of hardware, which might require some strength to handle, but this size helps ensure a secure fit. The locking mechanism works with a Trimax puck lock, known for reliability, which adds to ease of use and security. Some users might find the lock a bit heavy or bulky, but this is common with high-security trailer locks.

This product represents a strong choice for anyone looking to protect their 5th wheel trailer from theft, particularly for those who prioritize durability and clear visual signaling over lightweight convenience.